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- Question
As water is cooled from 4 deg C to 0 deg C, its density
Options- A. decreases
- B. increases
- C. remains same
- D. zero
- Correct Answer
- decreases
ExplanationWhen water is cooled from 4°C to 0°C, its density decreases.
When water cools from 4°C to 0°C, ice crystals begin to form because the water is approaching its freezing point. When water freezes, the water molecules form a lattice that increases the volume. As a result, the density decreases. This is why ice will float on top of water; ice has a lower density than the water.
- 1. The term protoplasm was coined by
Options- A. Hugo von Mohl
- B. J. E. Purkinje
- C. Oken
- D. Kolliker Discuss
- 2. Food handlers can contaminate food when they Discuss
- 3. What is a single celled organism called
Options- A. protoctists
- B. chromosomes
- C. unicellular
- D. bicellular Discuss
- 4. Which of the following is a healthy blood pressure level?
Options- A. 120/80 mmHg
- B. 140/90 mmHg
- C. 90/60 mmHg
- D. 120/140 mmHg Discuss
- 5. Which molecules prevent cell membranes from dissolving in water?
Options- A. Phospholipids
- B. Fattyacids
- C. Adenosine triphosphates
- D. None of the above Discuss
- 6. The amount of water vapor in the air is called
Options- A. Saturated air
- B. Precipitation
- C. Humidity
- D. Capacity Discuss
- 7. The end products of glycolysis are
Options- A. ATP
- B. NADH
- C. Pyruvate
- D. All of the above Discuss
- 8. Which practice reduces the risk of a boating emergency? Discuss
- 9. What is the role of NADP+ in photosynthesis? Discuss
- 10. Exercise improves memory and learning.
Options- A. TRUE
- B. FALSE Discuss
General Science problems
Search Results
Correct Answer: J. E. Purkinje
Correct Answer: 1) If they use the same cutting board/counter to cut raw chicken, and other foods with out sanitizing in between 2) If they have a cold, flu, or pink eye and are handling food, coughing without covering their mouth, then washing their hands 3) If they don't properly wash their vegetables 4) Not storing foods at proper temperatures And so many other reasons for Food handlers can contaminate food
Correct Answer: unicellular
Explanation:
An organism is a living thing, and there are two broad categories of organisms: those made up of only a single cell, and those made up of multiple cells.
Single-celled organisms means which contains only one cell are called unicellular organisms. 'Uni-' means 'one,' so the name 'unicellular' literally means 'one cell.'
Examples of Unicellular or Single celled organisms ::
Prokaryotic organisms like Bacteria,...
Some algae like green algae, euglena,...
Correct Answer: 120/80 mmHg
Explanation:
Healthy blood pressure ranges from 120/80 to 90/60.
Correct Answer: Phospholipids
Explanation:
Cell membranes are made up of phospholipids which prevents them from dissolving in water.
Correct Answer: Humidity
Explanation:
The amount of water vapor in the air is called Humidity. The amount of water vapor that air acn hold depends on the temperature of the air. The amount of water vapor in the air as compared with the amount of water that the air could hold is called Relative humidity.
Correct Answer: All of the above
Explanation:
Glycolysis involves the breaking down of a sugar into more manageable compounds in order to produce energy.
The net end products of glycolysis are two Pyruvate, two NADH, and two ATP.
Correct Answer: Developing a habit of wearing your lifejacket or PFD at all times also reduces the chance that you will drown should you find yourself in the water unexpectedly
Correct Answer: NADP - Nicotinamide Adenine Dinucleotide Phosphate is one of the carrier molecules that transfers high-energy electrons from chlorophyll to other molecules NADP+ is the molecule that accepts the electrons given by water Its reduction by the protein FNR (Ferredoxin NADP+ reductase) gives NADPH,H+ NADPH,H+ can be used in the Calvin Cycle to reduce 1,3-Biphosphoglycerate (1,3-BPG) into Glyceraldehyde-3-phosphate (G3P), a monosaccharide It becomes NADP+ again and the cycle keeps repeating as long as the chloroplast receives sufficient and appropriate light
Correct Answer: TRUE
Explanation:
Exercise can boost your memory and thinking skills by improvising alertness, attention and motivation.
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